<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 权限列表视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <el-table :data="rolelists" border stripe>
        <el-table-column type="expand">
          <!-- 展开列 -->
          <template slot-scope="scope">
            <!-- <pre>pre格式化数据{{scope.row}}</pre> -->
            <el-row :class="['bdbottom' , il == 0 ? 'bdtop' : '','vcenter']" v-for="(item1,il) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <el-row :class="[ i2 == 0 ? '' :'bdtop','vcenter']" v-for="(item2 ,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable @close="removeRightById(scope.row, item2.id)" type="success">{{item2.authName}}</el-tag>
                  </el-col>
                  <!-- 渲染二三级权限 -->
              <el-col :span="18">
                    <el-tag closable @close="removeRightById(scope.row, item3.id)" v-for="item3 in item2.children" :key="item3.id" type="danger">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button v-if="scope" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)"
              >编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id)">删除</el-button>
            <el-button @click="showSetRightDialog(scope.row)" type="info" icon="el-icon-upload">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addroles" ref="addroleRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addroles.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addroles.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" ></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 角色列表
      rolelists: [],
      addroles: {
        roleName: '',
        roleDesc: ''
      },
      // 控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的角色信息对象
      editForm: {},
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getrolesList()
  },
  methods: {
    // 获取角色列表数据
    async getrolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelists = res.data
      //   console.log(this.rolelists)
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addroleRef.resetFields()
    },
    // 点击按钮，添加新角色
    addRoles() {
      this.$refs.addroleRef.validate(async (valid) => {
        if (!valid) return
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addroles)

        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }

        this.$message.success('添加角色成功！')
        // 隐藏添加角色的对话框
        this.addDialogVisible = false
        // 重新获取角色列表数据
        this.getrolesList()
      })
    },
    // 修改角色
    // 展示编辑角色的对话框
    async showEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改角色信息的数据请求
        console.log(this.editForm)
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }

        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getrolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功！')
      })
    },
    // 根据Id删除对应的角色信息
    async removeUserById(id) {
      // 弹框询问角色是否删除数据
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      // 如果角色确认删除，则返回值为字符串 confirm
      // 如果角色取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }

      this.$message.success('删除角色成功！')
      this.getrolesList()
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      // console.log(role)
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList()
      role.children = res.data
    },
    // 分配权限
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // console.log(res.data)
      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getrolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 10px;
}
.bdtop{
  border-top: 1px solid rgb(172, 171, 171);
}
.bdbottom{
  border-bottom: 1px solid rgb(158, 156, 156);
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
